#include <iostream>

double lightYear2astronomical(double);

int main()
{
    using namespace std;
    cout << "Enter the number of light years: ";
    double ly;
    cin >> ly;
    double A;
    A = lightYear2astronomical(ly);
    cout << ly << " light years = "
         << A << " astronomical units\n";

   return 0;
}

double lightYear2astronomical(double temp)
{
    return temp*63240;
}
